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Signal processing technique in telecommunications
frequency-division multiplexing (FDM) is a technique by which the total bandwidth available in a communication medium is divided into a series of non-overlapping
Frequency-division multiplexing
Frequency-division_multiplexing
Method of encoding digital data on multiple carrier frequencies
In telecommunications, orthogonal frequency-division multiplexing (OFDM) is a type of digital transmission used in digital modulation for encoding digital
Orthogonal frequency-division multiplexing
Orthogonal_frequency-division_multiplexing
Method of encoding digital data on multiple carrier frequencies
Non-orthogonal frequency-division multiplexing (N-OFDM) is a method of encoding digital data on multiple carrier frequencies with non-orthogonal intervals
Non-orthogonal frequency-division multiplexing
Non-orthogonal_frequency-division_multiplexing
Method for multiplexing signals
Polarization-division multiplexing (PDM) is a physical layer method for multiplexing signals carried on electromagnetic waves, allowing two channels of
Polarization-division multiplexing
Polarization-division_multiplexing
Various meanings of the terms
scheme is orthogonal frequency-division multiplexing (OFDM), which refers to the use, by a single transmitter, of a set of frequency multiplexed signals
Orthogonality
Method of combining multiple signals into one signal over a shared medium
fading) or beamforming (improved selectivity) rather than multiplexing. Frequency-division multiplexing (FDM) is inherently an analog technology. FDM achieves
Multiplexing
Radio signal transmission method
Dynamic frequency hopping List of multiple discoveries Maximum length sequence Orthogonal frequency-division multiplexing Radio-frequency sweep "Furthermore
Frequency-hopping spread spectrum
Frequency-hopping_spread_spectrum
Data communications modulation protocol
frequencies Frequency-change signaling Multiple frequency-shift keying (MFSK) Orthogonal frequency-division multiplexing (OFDM) Phase-shift keying (PSK) Federal
Frequency-shift_keying
Optical multiplexing technique
Orbital angular momentum multiplexing is a physical layer method for multiplexing signals carried on electromagnetic waves using the orbital angular momentum
Orbital angular momentum multiplexing
Orbital_angular_momentum_multiplexing
Type of degradation in signal transmission
fs. Moose, P.H. (October 1994). "A technique for orthogonal frequency division multiplexing frequency offset correction". IEEE Transactions on Communications
Carrier_frequency_offset
Radio access technology for 5G networks
for the air interface of 5G networks. It is based on orthogonal frequency-division multiplexing (OFDM), as is the 4G (fourth generation) long-term evolution
5G_NR
Set of polynomials where any two are orthogonal to each other
Generalized frequency division multiplexing (GFDM) structure. More than one symbol can be carried in each grid of time-frequency lattice. Orthogonal polynomials
Orthogonal_polynomials
Use of multiple antennas in radio
Spatial multiplexing techniques make the receivers very complex, and therefore they are typically combined with orthogonal frequency-division multiplexing (OFDM)
MIMO
Frequency-division multiple access scheme
spectral nulls Carrier interferometry LTE Orthogonal frequency-division multiple access (OFDMA) Time-division multiple access "SC-FDMA vs. OFDM Modulation
Single-carrier_FDMA
scheme designed to be used in an Orthogonal Frequency-Division Multiplexing (OFDM) communication system for multiplexing and multiple access, enabling the
Carrier_interferometry
Telecommunications networks transmitted by radio waves
companies, which used frequency-division multiplexing to add channels to their point-to-point wireline plants before time-division multiplexing rendered FDM obsolete
Cellular_network
Process of varying one or more properties of a periodic waveform
extensively in Wi-Fi, cable television, and LTE systems. Orthogonal Frequency Division Multiplexing (OFDM): Splits the data across multiple, closely spaced
Signal_modulation
Iranian–American engineer; inventor of the Alamouti space–time block code
design of a commercial multiple-input multiple-output orthogonal frequency division multiplexing system known as Project Angel. He later served as CTO
Siavash_Alamouti
(macrodiversity) in orthogonal frequency-division multiplexing cellular networks. DSFN is based on the idea of single frequency networks, which is a group of radio
Dynamic single-frequency networks
Dynamic_single-frequency_networks
Physical or logical connection used for transmission of information
such as by multipair cable or separation, such as by frequency-division or time-division multiplexing. A path for conveying electrical or electromagnetic
Communication_channel
03415 [cs.IT]. Rou, H. S. (2024). "From Orthogonal Time–Frequency Space to Affine Frequency-Division Multiplexing: A comparative study of next-generation
Delay_Doppler
Timing correction in the GSM/LTE/5G NR cellular standards
it remains accurate. Carrier aggregation Cyclic prefix Orthogonal frequency-division multiplexing Random-access channel Round-trip delay Single-carrier
Timing_advance
Enhanced DWDM
transmission system". These techniques include orthogonal-band-multiplexed (OBM)-orthogonal frequency-division multiplexing (OFDM), no-guard-interval (NGI)-OFDM
Super-channel
Fourth-generation mobile telecommunications standard
Hatim Zaghloul and Michel Fattouche invented wideband orthogonal frequency-division multiplexing (WOFDM), the basis for wideband wireless communication
4G
512 kbit/s. Project Angel promised non-line of sight (NLOS) coverage using beamforming and orthogonal frequency-division multiplexing (OFDM). Service was launched
History_of_smart_antennas
Telecommunications standard for the wireless transmission of data through radio signals
services. It uses advanced multiplexing techniques including code-division multiple access (CDMA) as well as time-division multiplexing (TDM) to maximize throughput
Evolution-Data_Optimized
Air interface for 4G and 5G broadband wireless communications
Multiple-input, multiple-output orthogonal frequency-division multiplexing (MIMO-OFDM) is the dominant air interface for 4G and 5G broadband wireless communications
MIMO-OFDM
Very low energy, short range radio precise positioning
least 500 MHz of a narrow-band carrier; for example, orthogonal frequency-division multiplexing (OFDM))—can access the UWB spectrum under the rules. A
Ultra-wideband
Data transmission concept
channels or frequency bins using passband techniques to allow frequency-division multiplexing instead of sending a higher-quality signal. In data communications
Broadband
925 GHz.(5 cm) band. The 802.11a/h/n/ac/ax/be standards use Orthogonal Frequency Division Multiplexing (OFDM) to transmit data and therefore is not classified
High-speed_multimedia_radio
Family of digital modulation methods
their orthogonality. Another key property is that the modulations are low-frequency/low-bandwidth waveforms compared to the carrier frequency, which
Quadrature amplitude modulation
Quadrature_amplitude_modulation
Wireless technique of sending and receiving messages through water
pulse-position modulation (FPPM and PPM) Multiple frequency-shift keying (MFSK) Orthogonal frequency-division multiplexing (OFDM) Continuous Phase Modulation (CPM)
Underwater acoustic communication
Underwater_acoustic_communication
Digital terrestrial television standard
and other data in an MPEG transport stream, using coded orthogonal frequency-division multiplexing (COFDM or OFDM) modulation. It is also the format widely
DVB-T
Third generation mobile cellular system
a next generation air interface technology based upon orthogonal frequency-division multiplexing. The first national consumer UMTS networks launched in
UMTS
battery life. Orthogonal frequency-division multiple access (OFDMA) uses bundling of multiple small frequency bands that are orthogonal to one another to provide
Comparison of mobile phone standards
Comparison_of_mobile_phone_standards
Signal processing technique for sensor arrays
be able to reconstruct the original signal), and these are typically non-orthogonal unlike the FFT basis. Antenna diversity – Redundancy method to improve
Beamforming
Wideband Orthogonal Frequency Division Multiplexing (WOFDM),[non-primary source needed] and Multi-code Direct-sequence Spread Spectrum (MCDSSS).[non-primary
WiLAN
signals (BB H, BB V). This multiplexing/demultiplexing technique is based on the expected discrimination between the two orthogonal polarizations (XPD): an
XPIC
Wireless networking standard
network specifications that defined requirements for an orthogonal frequency-division multiplexing (OFDM) communication system. It was originally designed
IEEE_802.11a-1999
(THoRaCs), where undistorted orthogonal frequency-division multiplexing (OFDM) sub-carriers are embedded into a frequency modulation (FM) radar waveform
Electromagnetic radio frequency convergence
Electromagnetic_radio_frequency_convergence
Wireless broadband standard
uses scalable orthogonal frequency-division multiple access (SOFDMA), as opposed to the fixed orthogonal frequency-division multiplexing (OFDM) version
WiMAX
Wireless networking standard
Rate Support). The modulation scheme used in 802.11g is orthogonal frequency-division multiplexing (OFDM) copied from 802.11a with data rates of 6, 9, 12
IEEE_802.11g-2003
3GPP interface
generates part of the paging messages. IP E-UTRA uses orthogonal frequency-division multiplexing (OFDM), multiple-input multiple-output (MIMO) antenna
E-UTRA
Definitions of terms used in amateur radio
communications OFDM Orthogonal Frequency-Division Multiplexing, a method of encoding digital data on multiple carrier frequencies. Ohm The unit of electrical
Glossary_of_amateur_radio
synthesis – Frequency modulation – Frequency standard – Frequency synthesiser – Frequency – Frequency-division multiplexing – Frequency-exchange signaling
Index_of_electronics_articles
Data network that uses electrical wiring
in Geneva where it is referenced as G.9903, Narrowband orthogonal frequency division multiplexing power line communication transceivers for G3-PLC networks
Power-line_communication
using COFDMTooltip Orthogonal frequency-division multiplexing modulation. A total of eight national and one local 'multiplexes' are broadcast in the
Digital terrestrial television in the United Kingdom
Digital_terrestrial_television_in_the_United_Kingdom
Wireless networking standard in the 802.11 family
of the next generation standard. The use of MIMO-OFDM (orthogonal frequency division multiplexing) to increase the data rate while maintaining the same
IEEE_802.11n
Mobile broadband communication standard
350 km/h (220 mph) or 500 km/h (310 mph) depending on the frequency Orthogonal frequency-division multiple access for the downlink, Single-carrier FDMA for
LTE_(telecommunication)
ETSI standard for cordless telephony
defines a new physical interface based on cyclic prefix orthogonal frequency-division multiplexing (CP-OFDM) capable of up to 1.2 Gbit/s transfer rate with
DECT
Optical phenomenon
with different orbital angular momentum are orthogonal. Such orbital angular momentum based multiplexing can potentially increase the system capacity
Optical_vortex
Wireless communication technology using visible light
communications, specifically with the introduction of optical orthogonal frequency-division multiplexing (O-OFDM) modulation methods which have been optimized
Li-Fi
Digital radio broadcasting standard
digital video channel. The modulation used for DRM is coded orthogonal frequency division multiplexing (COFDM), where every carrier is modulated with quadrature
Digital_Radio_Mondiale
Equipment Manufacturer OES—Open Enterprise Server OFDM—Orthogonal frequency-division multiplexing OFTC—Open and Free Technology Community OFX—Open Financial
List of computing and IT abbreviations
List_of_computing_and_IT_abbreviations
Digital radio standard
of this project. DAB was the first standard based on orthogonal frequency-division multiplexing (OFDM) modulation technique, which since then has become
Digital_Audio_Broadcasting
Signals broadcast by GPS satellites
frequencies are used. Satellites using the same frequency are distinguished by using different ranging codes. In other words, GPS uses code-division multiple
GPS_signals
Type of display technology
multicore fiber transmission systems, again as a type of Space Division Multiplexing. LCoS has been used as a filtering technique, and hence a tuning
Liquid_crystal_on_silicon
Cellular telephone network standard since 1991
Telecommunications System (UMTS), code-division multiple access (CDMA) technology, nor the 4G LTE orthogonal frequency-division multiple access (OFDMA) technology
GSM
Discrete Fourier transform algorithm
for processing signals. Specifically, it is utilized in Orthogonal frequency-division multiplexing (OFDM) systems, such as 4G LTE and 5G NR. The efficiency
Fast_Fourier_transform
Family of wireless network protocols
single carrier, whereas 802.11a, Wi-Fi 4, 5 and 6 use orthogonal frequency-division multiplexing. Channels are used half duplex and can be time-shared
Wi-Fi
Type of angular momentum in light
characterized by their helical phase structure and orthogonal modal basis, enable multiplexing of multiple data streams while also producing spatially
Orbital angular momentum of light
Orbital_angular_momentum_of_light
Wireless network standard
interference by using direct-sequence spread spectrum (DSSS) and orthogonal frequency-division multiplexing (OFDM) signalling methods, respectively. 802.11a uses
IEEE_802.11
electromagnetic waves with frequencies between about 30 Hz and 300 GHz. The transmitter itself generates a radio frequency alternating current, which
Radio_transmitter_design
Device that modulates an analog carrier signal to encode digital information
lines, phone lines, and coaxial cables). G.hn devices use orthogonal frequency-division multiplexing (OFDM) to modulate a digital signal for transmission over
Modem
Former organization for adoption of ultra-wideband
layer and PHY layer specifications based on multi-band orthogonal frequency-division multiplexing (MB-OFDM). It was intended for short-range multimedia
WiMedia_Alliance
Soviet and Ukrainian scientist
of an ideal channel." But in 2001 Vadym Slyusar proposed such Non-orthogonal frequency digital modulation (N-OFDM) as an alternative of OFDM for communications
Vadym_Slyusar
Standards for terrestrial television signals
elements from DMB-T, ADTB-T and TiMi 3. DVB-T uses coded orthogonal frequency division multiplexing (COFDM), which uses as many as 8000 independent carriers
Broadcast_television_systems
Uses of radio and radio waves
channels in the 2.4 GHz and 5 GHz ISM bands with OFDM (orthogonal frequency-division multiplexing) modulation to transmit data at high rates. The transmitters
Applications_of_radio
Hatim Zaghloul and Michel Fattouche invented wideband orthogonal frequency-division multiplexing (WOFDM), the basis for wideband wireless communication
History_of_mobile_phones
Home networking over legacy wiring
physical layer based on fast Fourier transform (FFT) orthogonal frequency-division multiplexing (OFDM) modulation and low-density parity-check code (LDPC)
G.hn
Technical applications of optics
advanced modulation formats like phase-shift keying or even orthogonal frequency-division multiplexing have been investigated to counteract effects like dispersion
Photonics
3G mobile telecommunications protocols
available power margin. However, unlike HSDPA, uplink transmissions are not orthogonal to each other. In addition to this "scheduled" mode of transmission, the
High_Speed_Packet_Access
Repeater transmitter
spelling] guard interval used in ATSC standards than with the orthogonal frequency-division multiplexing (OFDM) used in the European and Australian DVB-T standard
Broadcast_relay_station
Swedish academic
multiple-antenna wireless systems. His most cited work, “Combining beamforming and orthogonal space-time block coding” was the first to address the association between
Mikael_Skoglund
Function used in signal processing
"System and method for generating a root raised cosine orthogonal frequency division multiplexing (RRC OFDM) modulation", published 2003, issued 2006 Media
Window_function
American-Jewish engineer (1926–2011)
mid-1980s. It was one of the first commercial products to use orthogonal frequency-division multiplexing, which was later widely deployed in DSL modems and Wi-Fi
Paul_Baran
System spectral efficiency of communication system
overall capacity in such scenarios, alternative sets of orthogonal functions called the quasi-orthogonal functions (QOF), which possess optimal minimax cross
CDMA_spectral_efficiency
Research and scientific development company
digital computer art was created in 1962 by Noll. In 1966, orthogonal frequency-division multiplexing (OFDM), a key technology in wireless services, was developed
Bell_Labs
Next-generation TV standard based on ATSC
uses a highly efficient physical layer that is based on orthogonal frequency-division multiplexing (OFDM) modulation with low-density parity-check code (LDPC)
ATSC_3.0
16-bit microprocessor
and are always word-aligned in memory. The instruction set is fairly orthogonal, meaning that, with few exceptions, instructions can use all methods of
TMS9900
16-bit microprocessor
makes register allocation for compilers more complicated compared to more orthogonal 16-bit and 32-bit processors of the time such as the PDP-11, VAX, 68000
Intel_8086
Wireless telephone services for mobile phones
Hatim Zaghloul and Michel Fattouche invented wideband orthogonal frequency-division multiplexing (WOFDM), the basis for wideband wireless communication
Mobile_telephony
American semiconductor company
Flarion Technologies, a developer of wireless broadband Orthogonal Frequency Division Multiplex Access (OFDMA) technology. Qualcomm announced Steven Mollenkopf
Qualcomm
Technique used in signal processing and data compression
points in terms of a sum of cosine functions oscillating at different frequencies. The DCT, first proposed by Nasir Ahmed in 1972, is a widely used transformation
Discrete_cosine_transform
Optical component which splits light into several beams
often used in monochromators, spectrometers, lasers, wavelength division multiplexing devices, optical pulse compressing devices, interferometers, and
Diffraction_grating
Open-source CPU instruction set architecture
specification, which mostly describes three privilege levels plus an orthogonal hypervisor mode. As of December 2021[update], version 1.12 is ratified
RISC-V
Capital and largest city of Montenegro
European urban practices - wide streets of New Town were laid out in an orthogonal grid, along with a spacious city square in its center. Since its inception
Podgorica
Television transmission using digital encoding
standards: Digital Video Broadcasting (DVB) uses coded orthogonal frequency-division multiplexing (OFDM) modulation and supports hierarchical transmission
Digital_television
Input and output device
1962 . This touchscreen utilized a matrix of collimated lights shining orthogonally across the touch surface. When a beam is interrupted by a stylus, the
Touchscreen
Defunct US modem manufacturer
based on orthogonal frequency-division multiplexing (OFDM). It employed a large number (initially up to 512) of closely spaced carrier frequencies, each
Telebit
Digital circuit that produces sums from inputs
values for either possible carry input (0 or 1) to the block, using multiplexers to select the appropriate result when the carry bit is known. By combining
Adder_(electronics)
Wideband Orthogonal Frequency Division Multiplexing (WOFDM),[non-primary source needed] and Multi-code Direct-sequence Spread Spectrum (MCDSSS).[non-primary
List of Egyptian inventions and discoveries
List_of_Egyptian_inventions_and_discoveries
Structure that contains the Saturn rocket guidance system
separate measurements, these links must be shared. Both frequency sharing and time sharing multiplexing techniques were used to accomplish this. The two modulation
Saturn_V_instrument_unit
Technical standard for digital televisions
Modulation: BST-OFDM (Band Segmented Transmission-Orthogonal Frequency Division Multiplexing). b) Frequency Band: VHF or UHF, according to the country implementation
ISDB-T_International
Paradigm of quantum computer
a short-enough time interval and with close-enough frequencies. In the KLM protocol, there are non-deterministic quantum gates, which are essential for
Linear optical quantum computing
Linear_optical_quantum_computing
South Korean science award
science, and electrical and electronic engineering Orthogonal code/resource hopping multiplexing method June Kim Jin-soo (김진수) Toolgen Co., Ltd. Chemistry
Scientist_of_the_Month
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